Mold-support.



H. TSCHERNING,

MOLD SUPPORT.

APPLICATION FILED DEC. 20, I916.

Patented June 12, 1917.

IIH.

HENRY TSGHEBNING, OF FREE-PORT, ILLINOIS, ASSIGNOR TO ARCADE MANUFACTUR- INGr COMPANY, OF FREEPORT, ILLINOIS, A CORPORATION OF ILLINOIS.

MOLD-SUPPORT.

Specification of Letters Patent.

Patented June 12, 1917.

Application filed December 20, 1916. Serial No. 137,980.

To all whom it may concern:

Be it known that I, HENRY TSCHERNING, a citizen of the United States, and resident of F reeport, in the county of Stephenson and State of Illinois, have invented certain new and useful Improvements in Mold- Supports, of which the following is a speciflcation, reference being had therein to the accompanying drawing.

In rock-over sand molding machines it is common to provide for the inverted flask a device which is readily adjustable to make contact at widely separated points with the lower flask-surface whether or not the latter is plane, and also to provide for vertical adjustment of the contact making devices to support equally well flasks of dilferent vertical dimensions.

This invention pertains to novel devices of this general kind, wherein old ends are secured by improved means, and it also involves certain new results secured by new means;

In the accompanying drawings: a

Figure 1 is a vertical section of the supporting devices on the line 11, Fig. 2.

Fig. 2 is a side elevation of the upper portion of the same devices looking from the left of Fig. 1, parts being broken away.

Fig. 3 is a plan view of the upper part of the structure seen in Figs. 1 and 2.

In these figures, 10 represents a suitable base, 11 a fluid pressure cylinder borne thereby, 12 a hollow plunger working in said cylinder, 13 a. smaller hollow plunger working in the larger one and rigidly fixed to, and upwardly closed by the central portion of, a frame 1 1 recessed to receive a superposed rocking H-like frame 15 having at the ends of its central portion rounded downwardly projecting flanges the end faces 16 of which are slidingly supported, respectively, by downwardly converging hardened plates 17 fixed in the recessed portlon of the frame 1 1, the plates thus supporting the frame in such manner that pressure applied to one end only thereof causes it to tilt, the rounded end sliding on the plates 17 Each transverse end portion of the frame 15 is provided with a longitudinal recess 18 having downwardly converging plates 19 upon which rest and readily slide the rounded ends 20 of tilting bars 21 each adapted to bear, near its ends only, upon a superposed flask. Each bar, like the frame 15, tilts when pressed down at one end only, its end faces sliding on the plates 19. Upon the top of the outer plunger 12 rests a spring 22 coiled about the smaller plunger, and upon the upper end of the spring rests a collar 23 which is at will clamped to the smaller plunger, and the latter, although usually free to slide therein, is at will fixed 1n the larger or outer plunger by a set screw 24,-. When a flask is rocked over to position above these devices, a small amount of com pressed fluid is admitted to the cylinder by the tube 25 so as to hold it partly raised and then fluid is admitted, by the pipe 26, for example, to the inner plunger, and the upper devices are thus raised until the bars 21 press and are adjusted against the lower surface of the flask. The collar is then forced down so as to give desirable compression of the spring and is then locked to the inner plunger, and neither spring nor inner plunger require further adjustment until flasks of another size are to be used. If now the flask is freed from the rock-over devices its entire weight is supported by the spring, the tension of which should be such that the full weight of the flask gives only slight additional compression. Compressed fluid being now allowed to escape from the cylinder by means of a pipe 27, or other suitable devices, the spring compensates the loss of weight due to the flasks leaving the pattern, and the initial drawing movement is very gentle, even with rapid work. When, after drawing the pattern, the flask is lifted from these devices the spring would tend to lift suddenly the inner plunger and parts above, and this tendency may be neutralized by a quarter turn of the set screws before the flask is lifted, thus locking this plunger until it supports another flask, when it may be again unlocked.

I claim:

1. In apparatus of the class described, the combination with a flask sustaining device including a body portion and tilting bars mounted thereon to receive directly a flask to be supported, of a vertically adjustable support for said device, and a spring interposed between the two and normally carrying the weight of said device and its load.

2. In apparatus of the class described, the combination with a flask sustaining device including a body portion, a member mounted thereon to rock in a vertical plane and independent bars transverse to said plane each having its ends only slidingly supported by said member, of a pneumatic cylinder having the piston arranged for rais ing and lowering said device.

3. In devices of the class described, the combination with a vertically adjustable suitably recessed approximately horizontal frame, of a tilting member slidingly Supported at its ends in the recessed frame, and adapted to tilt when downward pressure is applied at one end only of the member.

4. In devices of the class described, the combination with a frame provided with parallel recesses each having at it finds downwardly converging smooth surfaces, of independent bars located in said. recesses, respectively, and each having rounded ends supported by and in sliding contact with the corresponding surfaces, whereby the bars may tilt independently to fit against the face of a superposed flask.

5. In a device of the class described, the combination with means for raising a snitable frame, of an approximately horizontal frame spring-supported upon said means, arranged to, tilt therein in a fixed plane, and provided with pairs of downwardly converging smooth face portions in position to suppert, e i ly, the r n ends of flask-carrying bars, and flask-carrying bars each having its rounded ends slidingly supported by a pair of said face portions.

6. In apparatus of the class described, the

combination with a rigid frame having a set of suitable approximately parallel recesses with downwardly converging and faces, a tilting device impinging upon and supported by said faces and provided with transverse recesses having analogous end faces, and flask-supporting rocking members impinging upon and supported by the last mentioned end faces, whereby a flask whether or not its lower face is plane may receive proper support.

7 The combination with independent parallel bars adapted to support by their end portions, only, an inverted flask and each having suitable end bearingrsurfaces, of a member having downwardly converging faces in position to support said bearing su fa es, esnect e y, S pp r said member and permitting it tn rock in a plane transverse to said bars, and devices for raising and lowering said means.

8. The cenibination with a fluid cylinder and plunger rod for lowering an inverted o t epa e i fr m th Patter a rigid frame sustained by the plunger rod a p evid wit Su t b ays. ha in inclined end surfaces, bar-like mold sustaining devices having their ends. resting against said surfaces, respectively, and free to move th reen, and ec n a y a s i v m ld un porting devices similarly sr pported upon the e i e fir t ment d- In testimony whereof I hereunto my signature.

HENRY TS CITIERNI G.

Copies of this patent may be obtained for five cents each, by addressing the Qon nissioner of Patents,

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